Just for grins, I checked that bastion of factual knowledge called Wikipedia, and here's the results:
http://en.m.wikipedia.org/wiki/Chris...ulation_growth
Assuming the current growth rates are maintained through 2050 Christianity will still be the largest religion on planet earth. Although Islam's rate is BARELY higher than Christianity's, as Islam moves more into western nations that growth rate will - like everyone else's who experience upward mobility - decline. Interestingly enough, I recently read another report stating that the majority of western converts to Islam are women. Simply put, if western men aren't being attracted to Islam, it will eventually be irrelevant. The glut of Islamic women will be forced to either marry (and submit to) infidel husbands... or they'll have to move to the middle east and join a harem if they want a husband.
Seems kind of like an eventually self limiting phenomenon, doesn't it?
Meanwhile the world's resources are still controlled by Luciferian-humanist interests so both religions continue to play the role of either useful idiots or controlled opposition.
Maybe God will interrupt and ruin everyone's plans, tho?